Here is what I would do. First of all, I would get the outreach going to some of the rehab places and assisted living facilities, to all the senior care giver service providers (like Home Instead) and doctors' offices that cater to seniors. You might try physical therapy offices, too. I would also re-evaluate lease terms and offer flexible leases on this unit. That way, someone might start with a four month lease but not get better fast enough and renew for another three or four months. Charging a short term fee could help the budget.
I would also go look at the unit (probably the first thing to do
) and reassess it. Does it look like where I want to live? Why or why not? Does the unit have a lot of natural sunlight? I can tell you that when someone has mobility issues, it is great to be somewhere with a lot of natural light. I would add some little touches in the bathrooms and kitchens plus I would add some big Word Bubbles with large lettering showcasing features of the unit and the benefits of living in this one. I would also add patio furniture and if the community is pet friendly emphasize that residents can bring their fur babies, too! Help alleviate loneliness.
In your marketing materials, add that your community is handicap accessible. I can tell you these types of apartments can be hard to find when you need one! Make sure there is a van accessible handicapable parking space right by that unit, too. Many people in wheelchairs require vans or larger transportation.